19485189 has 12 divisors (see below), whose sum is σ = 28239276. Its totient is φ = 12946752.

The previous prime is 19485181. The next prime is 19485227. The reversal of 19485189 is 98158491.

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 14884164 = 2145^2 + 3858^2 .

It is not a de Polignac number, because 19485189 - 2³ = 19485181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19485181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (2353273).

Almost surely, 2^19485189 is an apocalyptic number.

It is an amenable number.

19485189 is a deficient number, since it is larger than the sum of its proper divisors (8754087).

19485189 is a wasteful number, since it uses less digits than its factorization.

19485189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236 (or 7233 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 19485189 is about 4414.2030990882. The cubic root of 19485189 is about 269.0924673935.

It can be divided in two parts, 1 and 9485189, that added together give a triangular number (9485190 = T₄₃₅₅).

The spelling of 19485189 in words is "nineteen million, four hundred eighty-five thousand, one hundred eighty-nine".